▎ 摘　　要

Graphene oxide (GO)-titania (TiO2) composite was synthesized using a chemical mixing process and its photocatalytic activity for the degradation of a toxic organic vapor (toluene) under different operational conditions was examined. The as-prepared GO-TiO2 and undoped TiO2 photocatalysts were characterized using SEM, XRD, and UV-VIS-NIR spectra. Moreover, the photocatalytic degradation efficiency of the GO-TiO2 composite was much higher than that of the P25 TiO2, with an average efficiency of the GO-TiO2 composite of 84% and an average efficiency of the TiO2 powder of just 13%. As the air flow rate increased from 1 to 4 L min(-1), the average degradation efficiencies of toluene decreased from 86 to 32%. In addition, as the initial concentration increased from 0.1 to 1.0 ppm, the average degradation efficiencies of toluene decreased from 86 to 8%. Overall, the GO-TiO2 composite could be applied effectively for purification of gaseous toluene under optimal operational conditions. (c) 2013 Elsevier Ltd. All rights reserved.